项目场景：

在学习SSM的路上老是遇见奇奇怪怪的报错，弄这些错误花费了巨大的精力，于是打算记录一下希望对正在学习的大家有帮助
第一个Mybatis项目

问题描述

错误提示如下：

org.apache.ibatis.binding.BindingException: Type interface com.qfedu.dao.StudentDAO is not known to the MapperRegistry.
---
# 原因分析：
//mapper包下的StudentMapper.xml文件
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com/qfedu/dao/StudentDAO.java"><insert id="insertStudent">insert into tb_students(stu_num,stu_name,stu_gender,stu_age)value(#{stuNum},#{stuName},#{stuGender},#{stuAge})</insert><delete id="deleteStudent">delete from tb_students where stu_num=#{stuNum}</delete>
</mapper>最后发现是mapper包下的<mapper namespace路径格式不对，
<mapper namespace="com/qfedu/dao/StudentDAO.java">是错误的（这是来自根源的路径）
<mapper namespace="com.qfedu.dao.StudentDAO">才是正确的（这是复制引用）
# 正确格式：
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.qfedu.dao.StudentDAO"><insert id="insertStudent">insert into tb_students(stu_num,stu_name,stu_gender,stu_age)value(#{stuNum},#{stuName},#{stuGender},#{stuAge})</insert><delete id="deleteStudent">delete from tb_students where stu_num=#{stuNum}</delete>
</mapper>

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mybatis问题【Type interface com.qfedu.dao.StudentDAO is not known to the MapperRegistry】

项目场景：

问题描述

mybatis问题【Type interface com.qfedu.dao.StudentDAO is not known to the MapperRegistry】相关推荐

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